1. прил. кратк. см. твёрдый
2. нареч. firmly, firm
твёрдо выучить ( вн. ) — learn* thoroughly ( d. )
твёрдо держаться — stand* firm / fast
твёрдо запомнил её слова — he remembered her words well, her words remained fixed in his memory
твёрдо решить (+ инф. ) — determine (+ to inf. , on ger. ), resolve (+ to inf. , on ger. )
он твёрдо решил уехать — he is determined to go, или on going; he has firmly resolved to go, или on going
твёрдо стоять на ногах — be steady on one's legs
твёрдо стоять на своём — stand* one's ground (firmly), hold* one's own, stand* firm